JOURNAL PAPER

Cansolv^® SO₂ Scrubbing System: Review of commercial applications for smelter SO₂ emissions control

V. Léveillé^I; T. Claessens^II

^ICansolv Technologies, Inc
^IIChemical Initiatives

SYNOPSIS

As new legislation drives metallurgical plants to lower SO₂emissions, plant managers face the challenge of keeping their costs under control. The Cansolv^® SO₂ Scrubbing System has been broadly adopted in the non-ferrous industry as a cost-effective solution for smelter operators to meet the new SO₂emissions targets.
The Cansolv^® SO₂ Scrubbing System is an amine-based regenerable process that selectively absorbs SO₂ from a variety of gases, including dilute smelter gases, such as furnace and converter gases. The system produces a pure, water-saturated SO₂by-product stream, which can then be directed to the front end of a sulphuric acid plant for conversion to sulphuric acid. When deployed in a smelter complex, the Cansolv^® SO₂Scrubbing System may also be used to process acid plant tail gas, allowing single absorption sulphuric acid plants to achieve emissions an order of magnitude lower than that of a double absorption acid plant with a lower capital investment. Depending on inlet gas temperature, SO₂emissions in the treated gas can be controlled to as low as 55 mg/Nm³.
This paper will describe some of the applications where customers have or are planning to use the Cansolv^® SO₂Scrubbing System, as well as which features and cost advantages for the treatment of smelter gases were important in the technology choice.

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